Thats it, its not like they would be gaining anything from it as far as money went.

Oh I forgot, Gabby would have actually been recieving anti-bodies to help protect her against the gastro you had while feeding her. Your body would have been producing the antibodies against the bug & then they would be passed throught the BM to Gabby. By continuing to feed while the mother is sick is a really good thing to do, because of the anti-bodies that are passed on through BM.
I too had a bout of Gastro while Glenn was little, Evan had it, then I got it, then DH had it. Everyone but Glenn. I even started expressing milk for Evan to have. I didn't think of the anti-body side of things when doing that, i just thought if thats all I can get him to have & keep down, its probabl the best thing I could offer.